EP0850400A1 - Transducteur de traction-compression, notamment pour systemes de freinage electromecaniques - Google Patents

Transducteur de traction-compression, notamment pour systemes de freinage electromecaniques

Info

Publication number
EP0850400A1
EP0850400A1 EP97931721A EP97931721A EP0850400A1 EP 0850400 A1 EP0850400 A1 EP 0850400A1 EP 97931721 A EP97931721 A EP 97931721A EP 97931721 A EP97931721 A EP 97931721A EP 0850400 A1 EP0850400 A1 EP 0850400A1
Authority
EP
European Patent Office
Prior art keywords
force sensor
fork
force
pressure
sensor module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97931721A
Other languages
German (de)
English (en)
Other versions
EP0850400B1 (fr
Inventor
Wolfgang Seils
Georg Blosch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0850400A1 publication Critical patent/EP0850400A1/fr
Application granted granted Critical
Publication of EP0850400B1 publication Critical patent/EP0850400B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/52—Torque sensing, i.e. wherein the braking action is controlled by forces producing or tending to produce a twisting or rotating motion on a braked rotating member
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
    • G01L1/125—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress by using magnetostrictive means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
    • G01L5/101—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors inserted into the flexible member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/005—Force, torque, stress or strain

Definitions

  • the invention relates to a pressure force sensor, in particular for the detection and control of wheel braking forces in electromechanical brake systems in motor vehicles, according to the preamble of the main claim.
  • a brake device for motor vehicles known from EP 0 566 133 B1
  • the necessary braking force is transmitted to the wheels by means of a hydraulic servo unit.
  • a master cylinder the cylinder pressure resulting from the depression of the brake pedal is measured and this measured value is used as a control signal for a hydraulic control device to optimize the braking effect.
  • the pressure sensor of the type described at the outset is advantageous in the development according to the invention with the characterizing features of claim 1 in that a pressure sensor is found which can be used to record all braking torques transmitted on the braked wheel and provides a suitable signal for further processing in a brake control device .
  • Magnetoelastic pressure sensors are used in an advantageous manner, which are usually used to sense pressure forces, which is also sufficient, for example, to regulate forces in the brake caliper of the brake system. According to the invention, it is avoided in a simple manner that two pressure sensors are necessary here in order to enable torque control for forward and backward travel. The problem of the introduction of force and the zero point drift in the event of overload for changing loads, as can occur when driving forwards and backwards with single sensor concepts, is solved according to the invention.
  • Regulation of the wheel braking torque can be done in a simple manner by sensing the support force in the mechanical Braking device are carried out on a torque support transmitting tensile and compressive forces, the wheel brake being articulated and being supported against this torque support. Regulation of the braking torque in electronically controlled braking systems with changing load direction is possible for both directions using the output signal of the pressure sensor with only one pressure force sensor.
  • Figure 2 shows the assembled functional pressure sensor.
  • FIG. 1 shows individual parts of a pressure sensor which has a fork arm 1 (see side view above) and a fork arm 2 (see top view in the middle) which has not yet been fully assembled. Furthermore, a force sensor module 3 and a pressure piece 4 and 5 are shown.
  • the fork arm 1 has a fixed fork end 6 (see above) and a fork end 7 which can be added at the end of the assembly. To explain the function of the pressure sensor is also made to Figure 2, which shows the fully assembled pressure sensor 8.
  • the cube-shaped magnetoelastic force sensor module 3 is enclosed by the two fork arms 1 and 2, which are each rotated through 90 ° with respect to one another.
  • the fork ends 6 and 7, as well as the fork end 11 and the invisible fork end of the fork arm 2 engage through bends 12 in each of the pressure pieces 4 and 5 so that tensile forces are introduced via the pressure pieces 4 and 5 as pressure forces into the force sensor module 3 become.
  • connection pieces 9 and 10 When pressure is applied to the connection pieces 9 and 10, the pressure force is thus transmitted via the pressure pieces 4 and 5 directly to the force sensor module 3 at the base points of the fork arms 1 and 2.
  • the bends 12 of the fork ends transmit the force to the force sensor module 3 and an output signal can be generated in the same way.
  • the pressure pieces 4 and 5 could also be firmly connected to the fork arms 1 and 2.
  • One fork arm 1 is divided in the area of a contact zone with the force sensor module 3 for better assembly and, as described above, has a separate fork end 7, which is attached in such a way that, despite interference contours, e.g. for cable bushings for the force sensor module 3 etc. an assembly is made possible.
  • the fork arm 1 can, for example, also form a unit with the pressure piece 4, the necessary decoupling being able to be achieved by loosely coupling the fork arm 1 to the connecting piece 9.
  • the force sensor module 3 can be constructed in a conventional technique, for example as described with a magnetoelastic module in which slight changes in the mechanical contour due to pressurization lead to a change in the magnetic properties and this change can be evaluated electronically.
  • a structure with strain gauges that undergo an electrical resistance change when subjected to mechanical stress can also be used here without departing from the principle of the invention.
  • Other elements suitable for compressive force sensing that experience a change in their electrical properties when subjected to mechanical stress can also be used here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne un détecteur de pression comprenant deux raccords (9, 10) opposés qui servent à transmettre une force à un module détecteur de force, situé à l'intérieur et émettant un signal de sortie dépendant de la force de compression extérieure. Afin de permettre la détection de forces de compression et de forces de traction, chaque raccord (9, 10) est équipé d'un bras de fourche (1, 2) dont les extrémités entourent le module détecteur de force (3) avec un décalage de 90°. Placés entre le pied des bras de fourche (1, 2) et la surface transmission de force du module détecteur de force (3), des éléments de pression (4, 5) sont entourés latéralement par les parties coudées (12) des extrémités de fourche.
EP97931721A 1996-07-17 1997-07-09 Transducteur de traction-compression, notamment pour systemes de freinage electromecaniques Expired - Lifetime EP0850400B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19628814 1996-07-17
DE19628814A DE19628814C1 (de) 1996-07-17 1996-07-17 Druckkraftsensor
PCT/DE1997/001444 WO1998003844A1 (fr) 1996-07-17 1997-07-09 Transducteur de traction-compression, notamment pour systemes de freinage electromecaniques

Publications (2)

Publication Number Publication Date
EP0850400A1 true EP0850400A1 (fr) 1998-07-01
EP0850400B1 EP0850400B1 (fr) 2000-12-27

Family

ID=7800072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97931721A Expired - Lifetime EP0850400B1 (fr) 1996-07-17 1997-07-09 Transducteur de traction-compression, notamment pour systemes de freinage electromecaniques

Country Status (5)

Country Link
US (1) US6176139B1 (fr)
EP (1) EP0850400B1 (fr)
JP (1) JPH11513121A (fr)
DE (2) DE19628814C1 (fr)
WO (1) WO1998003844A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19805687B4 (de) * 1998-02-12 2010-11-11 Alcatel Lucent Vorrichtung zum Ermitteln einer Kraft
GB0204871D0 (en) * 2002-03-01 2002-04-17 Maddison Anthony Load cell
US7000484B2 (en) * 2003-03-25 2006-02-21 Kulite Semiconductor Products, Inc. Load beam apparatus operative to prevent improper operation due to off axis loads
DE102004047959A1 (de) * 2004-10-01 2006-04-06 Siemens Ag Verfahren und Vorrichtung zur Bestimmung des Drucks in Rohren
CN103884455B (zh) * 2012-12-20 2015-11-25 国家核电技术有限公司 拉力测量装置
JP5947229B2 (ja) * 2013-01-10 2016-07-06 Ntn株式会社 磁気式荷重センサおよび電動ブレーキ装置
CN105865699B (zh) * 2016-06-03 2018-12-11 北方工业大学 一种检测无人机制动系统失衡的方法及装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920880A (en) * 1955-08-02 1960-01-12 Ici Ltd Devices employing strain gauges and adapted to measure weight or force
US3110175A (en) * 1959-07-28 1963-11-12 Toledo Scale Corp Load cell
US3036283A (en) * 1960-05-27 1962-05-22 Lockheed Aircraft Corp Load cell transducer
US3399564A (en) 1965-07-26 1968-09-03 Freightliner Corp Load cell
US3572102A (en) * 1969-05-12 1971-03-23 Francis I Baratta Fixture for testing brittle materials
US4088907A (en) * 1976-10-29 1978-05-09 Westinghouse Electric Corp. Piezoelectric acoustic emission instrumentation
FR2487069A1 (fr) * 1980-07-21 1982-01-22 Sfena Procede et dispositif pour la mesure d'au moins une composante des efforts exerces sur une poutre
DE9010026U1 (de) * 1990-07-02 1991-11-07 Lucas Industries P.L.C., Birmingham, West Midlands Scheibenbremse
SE467986B (sv) 1991-02-18 1992-10-12 Wabco Holdings Sab Lastcell foer avgivning av en signal beroende paa den daerpaa utoevade kraften jaemte en anvaendning av en lastcell vid ett bromsarrangemang
JP3018728B2 (ja) * 1992-04-16 2000-03-13 トヨタ自動車株式会社 車両用ブレーキ装置
US5490427A (en) * 1994-10-17 1996-02-13 Fanuc Usa Corporation Six axis force sensor employing multiple shear strain gages

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9803844A1 *

Also Published As

Publication number Publication date
US6176139B1 (en) 2001-01-23
DE19628814C1 (de) 1997-12-04
WO1998003844A1 (fr) 1998-01-29
DE59702812D1 (de) 2001-02-01
JPH11513121A (ja) 1999-11-09
EP0850400B1 (fr) 2000-12-27

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